Projectile.



J. H. BROWN.

PRQJEGTILE. APBLIGAIION FILED DEG13,1910.

v To all whom it may concern:

UNITED STATES PA FFQ,

JOHN H. BROWN, OF WEST HOBOKEN, JERSEY.

PROJEGTI LE.

Specification of Letters Patent.

Patented July 2, 1912..

Application filed December 13, 1910. Scrial'No, 597,074.

Be it known that I, JOHN H. Brown, a

citizen of the United States, and resident of Vest Hoboken, in thecounty of Hudson and State of'New Jersey, have invented a new and usefulImprovement in Projectiles, of

- which the following is a specification.

My invention relates to projectiles with the-object in which willprevent the escape of hotgases A' practical embodiment of the invention1s represented 1n the accompanying drawings in which,

' Figure 1 is a View of a portion of a gun the front portion of thechase in proximity thereto, in section; a projectile forming thesubject-matter being shown in side elevation located in the barrel in,positionfor firing. 2 is a view of the projectile in longitudinalsection, and Fig. 3 is a view of the projectile rear elevation. Thepowder chamber is denoted by 1, the ered forward end of the powderchamber barrel including my '2, a smooth bore portion of the chase inwhich the pro ectile is seated, by 3, 'and the rifled portion of thechase by 4:.

The body of the projectile is denoted by 5, and may be of any well knownor approved form save only as it is modified'at erably the heel for theattachment thereto of the parts to be hereinafter described.

" At a point intermediate of its length, prefnear its heel end, the bodyof the projectile is'reduced to receive a rotating band 6. I preferablymake this band broad and provide it with grooves 7 extending around'itsperiphery. The rear end of the projectile 5 has attached thereto, in thepresent instance by several screws 8, a disk 9 of some suitable toughelastic material,

such, for example, as hard or vulcanized fiber, the thickness of saiddisk preferably being about one-sixth the diameter of the body of theprojectile. For instance, if the projectile be six inches in diameter,the thicknessiof the disk 9 would preferably be one inch. The centralportion of the disk 9 is'ourved rearwardly, as shown at 10, so as toform between the face of the disk and the heel'end of the projectile, achamber 11 fgr View of providing a projectile slope 2 and compressed soprevent the gases fromescaping past it.

of the present invention- This chamber 11 preferably communicatesthrough radial channels 12, with" an annular 13. on the periphery of thedisk 9.

In operation, when the explosive charge in the powder chamber 1 isexploded, its pressure will-tend to flatten the central part 10 of thedisk 9, and thereby force the lubricant through the channels 12 to thegroove 13 and hence to the interior surface of the chase of the gun andat the same time the tough elastic disk 9 will be forced along the as toefi ectually As the-projectile travels along the chase toward the muzzleend, any slight opening between the lands of the rifled portion 4 of thechase andcthe'rotating band 6 due to attrition between the faces of thelands and thenon-elastic rotating band will be completely shut off fromthe gases resulting from theexplosive charge by the tough elastic disk9, the elastic nature of said disk being suflicientto cause the disk toexpand from its compressed. condition to an extent as great or greaterthan any wear which may take place between it, the tough elastic disk,and the interior of. the chase. Furthermore, as the tough elastic diskis located at the extreme rear end of the projectile, the gases will notbe allowed to escape between the and any portion of interior of thechase the projectile since .the said gases will be completely held backfrom such escape until the disk 9 leaves the muzzle.

lVhile I have shown the body of the projectile 5 as solid, it is obviousthat it may be a-shell as well as a solid shot, and further -I do notwish to limit myself to any particular thickness of the elastic disk atthe heel end of the projectile, nor to the radial passages leading fromthe lubricant chamher to the exteriorof the disk, as the said lubricantmay be forced outwardly between the inner face. of said disk 9 and theheel end of theprojectile.

What I claim is:

1. A projectile provided with a disk of tough elastic material securedto its rear end and a rotating band of soft metal seated on theprojectile, the said disk of elastic material having a diameter greaterthan the diameter of the projectileincluding the soft metal rotatingband.

2. A projectile provided fwlth a dlsk of groove i lprsvlded 1th radialchannels leading from i wltnessesz tough elastic mateiial secured to therar as my invention, I' have signed my nam in end 01 the. projec 1e andshaped to form a presence of two witnesses, this twelfth day lubricantchgunb 7 between the disk and the vof December, 1910. rear end 'of theietile, the said disk being JOHN 1-1, BROWN.

the sai i chamber lo its periphery.

F. GEORGE BARRY, .In testnnony, that I 21211111 the fnregoing HENRY C;THIEME.

